syzkaller login: [ 35.473345] BUG: Bad rss-counter state mm:0000000083d89845 type:MM_FILEPAGES val:33 [ 35.474647] BUG: Bad rss-counter state mm:0000000083d89845 type:MM_ANONPAGES val:22 [ 35.513508] ================================================================== [ 35.514624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.515547] Read of size 8 at addr ffff88800dfc2b38 by task sshd/218 [ 35.516321] [ 35.516535] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.517650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.518683] Call Trace: [ 35.519099] [ 35.519478] dump_stack_lvl+0x91/0xf0 [ 35.520049] print_report+0xcc/0x620 [ 35.520533] ? __virt_addr_valid+0x102/0x340 [ 35.521161] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.521923] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.522689] kasan_report+0xbe/0xf0 [ 35.523240] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.523858] vma_interval_tree_remove+0xc75/0xec0 [ 35.524458] vma_prepare+0xc54/0x11a0 [ 35.524939] __split_vma+0x5af/0x950 [ 35.525406] ? __pfx___split_vma+0x10/0x10 [ 35.525929] ? find_held_lock+0x2c/0x110 [ 35.526466] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.527050] ? lock_is_held_type+0x9f/0x120 [ 35.527593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.528204] ? mtree_range_walk+0x632/0x900 [ 35.528756] ? mas_walk+0x5c7/0x7c0 [ 35.529242] do_vmi_munmap+0x1f1/0x2b0 [ 35.529743] mmap_region+0x1f9/0x2660 [ 35.530248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.530761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.531467] ? __pfx_lock_acquire+0x10/0x10 [ 35.532005] ? __pfx_mmap_region+0x10/0x10 [ 35.532532] ? security_mmap_addr+0x7d/0xa0 [ 35.533065] ? get_unmapped_area+0x1f5/0x3f0 [ 35.533618] do_mmap+0x854/0xf00 [ 35.534054] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.534554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.535115] ksys_mmap_pgoff+0x3af/0x500 [ 35.535622] do_syscall_64+0x3f/0x90 [ 35.536098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.536744] RIP: 0033:0x7ff899942d82 [ 35.537204] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 35.539329] RSP: 002b:00007ffdad568728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.540223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff899942d82 [ 35.541063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff898d7c000 [ 35.541901] RBP: 00007ff898d7c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.542751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555772a13d90 [ 35.543604] R13: 00007ffdad568740 R14: 00007ffdad568770 R15: 00007ffdad568ad0 [ 35.544470] [ 35.544768] [ 35.544986] Allocated by task 211: [ 35.545422] kasan_save_stack+0x22/0x50 [ 35.545929] kasan_set_track+0x25/0x30 [ 35.546445] __kasan_slab_alloc+0x59/0x70 [ 35.546965] kmem_cache_alloc+0x16b/0x370 [ 35.547483] vm_area_dup+0x20/0x160 [ 35.547935] __split_vma+0x170/0x950 [ 35.548396] split_vma+0xc6/0x110 [ 35.548830] mprotect_fixup+0x8d2/0xb30 [ 35.549331] do_mprotect_pkey+0x87e/0xd40 [ 35.549844] __x64_sys_mprotect+0x78/0xc0 [ 35.550380] do_syscall_64+0x3f/0x90 [ 35.550858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.551493] [ 35.551715] Freed by task 211: [ 35.552111] kasan_save_stack+0x22/0x50 [ 35.552611] kasan_set_track+0x25/0x30 [ 35.553099] kasan_save_free_info+0x2b/0x50 [ 35.553631] __kasan_slab_free+0x10a/0x190 [ 35.554182] kmem_cache_free+0x10d/0x4d0 [ 35.554784] rcu_core+0x8c8/0x2860 [ 35.555227] __do_softirq+0x1b7/0x7d4 [ 35.555704] [ 35.555921] Last potentially related work creation: [ 35.556509] kasan_save_stack+0x22/0x50 [ 35.557014] __kasan_record_aux_stack+0x8e/0xa0 [ 35.557587] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.558241] remove_vma+0x139/0x170 [ 35.558691] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.559249] do_vmi_munmap+0x1f1/0x2b0 [ 35.559731] __vm_munmap+0x138/0x3a0 [ 35.560195] __x64_sys_munmap+0x59/0x80 [ 35.560692] do_syscall_64+0x3f/0x90 [ 35.561168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.561808] [ 35.562025] The buggy address belongs to the object at ffff88800dfc2ae0 [ 35.562025] which belongs to the cache vm_area_struct of size 168 [ 35.563493] The buggy address is located 88 bytes inside of [ 35.563493] freed 168-byte region [ffff88800dfc2ae0, ffff88800dfc2b88) [ 35.564881] [ 35.565096] The buggy address belongs to the physical page: [ 35.565758] page:000000004eda7e6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc2 [ 35.566852] memcg:ffff88800e85c101 [ 35.567277] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.567919] page_type: 0xffffffff() [ 35.568368] raw: 0100000000000200 ffff8880087a0c80 ffffea000036bcc0 dead000000000002 [ 35.569284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e85c101 [ 35.570183] page dumped because: kasan: bad access detected [ 35.570838] [ 35.571054] Memory state around the buggy address: [ 35.571624] ffff88800dfc2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.572469] ffff88800dfc2a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.573315] >ffff88800dfc2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.574158] ^ [ 35.574783] ffff88800dfc2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.575628] ffff88800dfc2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.576481] ================================================================== [ 35.577399] Disabling lock debugging due to kernel taint [ 38.116718] BUG: Bad rss-counter state mm:000000009c06f3aa type:MM_FILEPAGES val:33 [ 38.117892] BUG: Bad rss-counter state mm:000000009c06f3aa type:MM_ANONPAGES val:22 [ 38.596493] BUG: Bad rss-counter state mm:000000008273a459 type:MM_FILEPAGES val:33 [ 38.597655] BUG: Bad rss-counter state mm:000000008273a459 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6936' (ECDSA) to the list of known hosts. 2023/06/21 04:13:03 fuzzer started 2023/06/21 04:13:04 dialing manager at localhost:36067 2023/06/21 04:13:04 checking machine... 2023/06/21 04:13:04 checking revisions... [ 39.216820] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:13:04 testing simple program... [ 39.267191] cgroup: Unknown subsys name 'net' [ 39.327661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f52adf93650 CR3=000000000c596000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2033303a33313a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a33313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017e10001 RBX=ffff888017e0ff20 RCX=0000000000000001 RDX=ffff888017e0ff28 RSI=ffff888017e0fef0 RDI=ffff888017e0f7d8 RBP=ffff888017e08000 RSP=ffff888017e0f758 R8 =0000000000000001 R9 =ffff888017e0f808 R10=0000000000038001 R11=000000000008a966 R12=ffff888017e0f828 R13=ffff888017e0f810 R14=ffff888017e0fef0 R15=ffff888017e0f7c8 RIP=ffffffff8113128d RFL=00000287 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f52ad9de900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6200cd97f0 CR3=000000000dc78000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000